context.arch.comm
Interface CommunicationsClient

All Known Implementing Classes:

HTTPClientSocket

public interface CommunicationsClient

This interface specifies all the methods a CommunicationsClient object must support allowing the details of the specific protocol used to be abstracted away.

See Also:

CommunicationsObject

Method Summary

java.lang.String	addRequestProtocol(java.lang.String data, java.lang.String listener) This abstract method adds the protocol to a request to be sent
java.lang.String	addRequestProtocol(java.lang.String data, java.lang.String listener, java.lang.String type) This abstract method adds the protocol to a request to be sent
DataObject	getErrorMessage() This abstract method generates an error message if a request can't be handled properly, to the point where a contextual error message can still be sent as the reply
java.lang.String	getFatalMessage() This abstract method generates an fatal message if a request can't be handled properly, to the point where no contextual error message can be sent as the reply
java.lang.String	getProtocol() Abstract method to get the communications protocol being used
java.net.Socket	sendRequest(java.lang.String request) This abstract method sends a request
RequestData	stripReplyProtocol(java.net.Socket socket) This abstract method strips the protocol away from the received reply

Method Detail

getProtocol

public java.lang.String getProtocol()

Abstract method to get the communications protocol being used

Returns:

the protocol being used

stripReplyProtocol

public RequestData stripReplyProtocol(java.net.Socket socket)
                               throws ProtocolException

This abstract method strips the protocol away from the received reply

Parameters:

socket - The socket the reply is being received on

Returns:

the reply with the protocol stripped away in the form of a RequestData object

Throws:

ProtocolException - thrown if protocol can't be stripped away

See Also:

addRequestProtocol(String,String), CommunicationsServer.stripRequestProtocol(Socket), CommunicationsServer.addReplyProtocol(String)

addRequestProtocol

public java.lang.String addRequestProtocol(java.lang.String data,
                                           java.lang.String listener)
                                    throws ProtocolException

This abstract method adds the protocol to a request to be sent

Parameters:

data - The request to add the protocol to

listener - The recipient of the request (eg, an URL in HTTP). May be null.

Returns:

the request with the protocol added

Throws:

ProtocolException - thrown if protocol can't be added

See Also:

stripReplyProtocol(Socket), CommunicationsServer.stripRequestProtocol(Socket), CommunicationsServer.addReplyProtocol(String)

addRequestProtocol

public java.lang.String addRequestProtocol(java.lang.String data,
                                           java.lang.String listener,
                                           java.lang.String type)
                                    throws ProtocolException

This abstract method adds the protocol to a request to be sent

Parameters:

data - The request to add the protocol to

listener - The recipient of the request (eg, an URL in HTTP). May be null.

type - The type of the request: GET or POST.

Returns:

the request with the protocol added

Throws:

ProtocolException - thrown if protocol can't be added

See Also:

stripReplyProtocol(Socket), CommunicationsServer.stripRequestProtocol(Socket), CommunicationsServer.addReplyProtocol(String)

sendRequest

public java.net.Socket sendRequest(java.lang.String request)
                            throws java.io.IOException

This abstract method sends a request

Parameters:

request - The request to send

Returns:

the reply to the request

Throws:

java.io.IOException

getErrorMessage

public DataObject getErrorMessage()

This abstract method generates an error message if a request can't be handled properly, to the point where a contextual error message can still be sent as the reply

See Also:

getFatalMessage()

getFatalMessage

public java.lang.String getFatalMessage()

This abstract method generates an fatal message if a request can't be handled properly, to the point where no contextual error message can be sent as the reply

See Also:

getErrorMessage()